ANR Operating Instructions for Standard Module

Operating instructions

1. As previously stated, silicone gel earseals are required for proper operation of this unit. Other items, such as cloth earcovers are not airtight and will cause significant loss of anr strength. Extra-thick earseals (i.e., Oregon Aero Soft Seal) will cause extreme loss of anr strength because of the additional volume inside the earcup/ earseal assembly. Oregon Aero does have a 3/4" version of their Soft Seal which can be used with the anr module.

2. Please note that each module is labeled R or L. Next to this is a small electret microphone housed in a grommet. Your headset must be always be worn with the left module on your left side and right module on your right side. This insures that the microphones will be located in the proper position (forward part of each cavity surrounding the ear). They must remain in this position. The practical result is that the position of the "boom-mic" is now fixed (right of left). These instruction assume you wear the boom mic on the left. If you wish to wear the boom mic on the right, you should install the right module in to the earcup with the boom mic.

3. A standard aircraft radio is all that is required to power the audio portion of the anr modules. However, an audio signal is not necessary for the active noise reduction circuit to operate. Supplying 9v to the modules will activate the noise canceling system.

If audio reception or transmission is "scratchy", check for tarnished brass tips on audio or mic plug. Polish if necessary.

4. Volume levels on your headset should be pre-set at maximum. Then, to further adjust the volume, adjust the intercom volume control. Setting your headset volume control at less than maximum may cause you to increase the intercom volume to a point where the intercom is over driven & distortion may result.

5. In cold conditions (below 32 f) remove the headset from the aircraft after each flight. If headset becomes cold soaked it is more subject to moisture condensation. Otherwise, summertime cabin temperatures will not damage or degrade the unit.

6. Prolonged use (3+ hrs) under extremely cold conditions (under 20 degrees f) can result in moisture condensation inside the headset causing temporary malfunction. Allow unit to warm & dry before resuming use.

7. Test the active noise system on the ramp prior to each use. If there is any indication of a malfunction the power should be turned off and the headset used conventionally.

8. Life of a high quality 9V battery should be approximately 15-20 hours. To guard against accidentally leaving power on, unplug the power cable from battery case when unit not in use.

9. The active noise reduction modules require a very stable power supply. Use of cheaper 9v batteries or non-approved power supply systems will cause malfunctions, possibly damaging the circuitry. We recommend Dura-Cell , Energizer, or Ray-O-Vac.

10. Do not attempt to power the anr modules directly from your aircraft electrical system without using our panel mount power unit. The voltage spikes & background static from most aircraft are enough to damage the very sensitive integrated circuits in the modules. Our panel mount power unit has dual voltage regulators and is isolated with a DC/DC converter.

11. A continuity tester is very helpful, and is usually required to trace a malfunction. They are available for under $15.

12. Do not insert any material into the modules, such as the original cloth inserts or earcovers, foam rubber, etc., except for the black and white oval fabric pieces provided.

IMPORTANT: 2 black/white oval pieces of fabric are provided with each set. This material is intended to keep dirt & debris out of the speaker elements and to acoustically dampen the anr modules. One should be placed inside each anr module, covering the speaker grill holes & the microphones. Use of the fabric pads is mandatory. Failure to use these may result in feedback (squealing). If the pads are lost or become soiled, call for a free set of replacements.

A technician is generally available M-F from 10:00 A.M. to 5:00 P.M. (Central Time) at (806) 358-6336.



		Note: For a higher quality display of the installation instructions, download the PDF file containg the information on this page.



	Operating instructions 1. As previously stated, silicone gel earseals are required for proper operation of this unit. Other items, such as cloth earcovers are not airtight and will cause significant loss of anr strength. Extra-thick earseals (i.e., Oregon Aero Soft Seal) will cause extreme loss of anr strength because of the additional volume inside the earcup/ earseal assembly. Oregon Aero does have a 3/4" version of their Soft Seal which can be used with the anr module. 2. Please note that each module is labeled R or L. Next to this is a small electret microphone housed in a grommet. Your headset must be always be worn with the left module on your left side and right module on your right side. This insures that the microphones will be located in the proper position (forward part of each cavity surrounding the ear). They must remain in this position. The practical result is that the position of the "boom-mic" is now fixed (right of left). These instruction assume you wear the boom mic on the left. If you wish to wear the boom mic on the right, you should install the right module in to the earcup with the boom mic. 3. A standard aircraft radio is all that is required to power the audio portion of the anr modules. However, an audio signal is not necessary for the active noise reduction circuit to operate. Supplying 9v to the modules will activate the noise canceling system. If audio reception or transmission is "scratchy", check for tarnished brass tips on audio or mic plug. Polish if necessary. 4. Volume levels on your headset should be pre-set at maximum. Then, to further adjust the volume, adjust the intercom volume control. Setting your headset volume control at less than maximum may cause you to increase the intercom volume to a point where the intercom is over driven & distortion may result. 5. In cold conditions (below 32 f) remove the headset from the aircraft after each flight. If headset becomes cold soaked it is more subject to moisture condensation. Otherwise, summertime cabin temperatures will not damage or degrade the unit. 6. Prolonged use (3+ hrs) under extremely cold conditions (under 20 degrees f) can result in moisture condensation inside the headset causing temporary malfunction. Allow unit to warm & dry before resuming use. 7. Test the active noise system on the ramp prior to each use. If there is any indication of a malfunction the power should be turned off and the headset used conventionally. 8. Life of a high quality 9V battery should be approximately 15-20 hours. To guard against accidentally leaving power on, unplug the power cable from battery case when unit not in use.